Preheater for stoves.



H. F. MYERS a. E. E. SNYDEH. PREHEATER ron sTovEs.

APPLICATION FILED IAN.28, |916.

Patented Oct. 24,1916.

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HARRY r. MYnns, or Lancasrnn, Ann EDGAR n. snrnnr., or corni/inra, PENNSYL- VANIA.

PREHEATER FOR STOVES.

Patenten oet. sa, 1ero,

Application led January 28, 1916. Serial No. 74,927.

To all whom t may concern Be it known that we, HARRY F. MYERS and EDGAR E. SNYDER, citizens of the United States, residing, respectively, at Lancaster and Columbia, in the county of Lancaster and State of Pennsylvania, have invented new and useful Improvements in Preheaters for Stoves, of which the following is a specification.

The present invention relates to preheaters for stoves, and is intended to bring about a more perfect combustion and consumption ofthe fuel gases by delivering to the fire boX a volume of heated air which will not only promote fuel combustion but will bring about a burning of the fuel gases thrown o by suchfuel during burning.

It contemplates as its preferred embodiment a stove lid of not unusual form and dimensionswhich is provided with adjuncts which insure the preheating and' delivery to the iire-boX of a sutlicient volume of air to bring about the results aimed at, provision being made for regulating and controlling the delivery of preheated air to meet the necessities of the case.

Broadly considered, preheating lids for delivering air to the fuel boX are old and we do not claim to be the rst tohave conceived of this broad idea and embodied it in a preheating lid, but the present device is an improvement on certain devices now known to us, the construction which we have developed being simple and cheap of manufacture and at the same time giving a highly eliticient device.

In the drawings herewith we have shown one lembodiment `of our invention, and in said drawings,-Figure 1 is a plan view of a stove lid embodying ourinvention, certain parts being shown in dotted lines. Fig. 2 is a sectional view of the lid shown in Fig.

1, the scale of Fig. 2 being somewhat greater l than the scale to which Fig. 1 is drawn, for clearness of illustration. Fig; 8 is a plan view of the heating chamber which is attached to the lid proper in order to show the interior construction of that chamber.

Referring to the drawings, like numbers indicating like parts in the several views, 10 denotes the lid proper having the lifter aperture 11, and, as herein shown, provided centrally with an intake opening 12. This intake opening is surrounded by a wall 13 within which is mounted a regulating and controlling slide 14 pinned in place by a pin 15 passing through a slot in the slide 14.

T he said slide 14 is designed to control and regulate the intake aperture 12. the various positions'of the slide 14 being Iindicated in F ig. 1 in full and dotted lines. yThe said wall 18, in conjunction with lugs 1G symmetrically disposed on the lid 10, serves as a support for such kitchen utensil as may be used, holding such utensil in elevated position andalso forms a guide for the regulating plate 14. In order that there may be free flow of air to the intake aperture 12, I preferably cut the wall 13 by means of channels 17, 18 and 19, as shown in Fig. 1, and these channels are so disposed relative to the intake aperture as to serve as directing meansV to indicate the several positicns ofA the slide 14. It will be observed (F ig. 2) that the slide 14 is disposed in a plane below the top of the wall 18 and below the delivery mouths'of the channels 17, 18 and 19, so that there will kbe no interference with the delivery of the air by these channels to the aperture 12. |The channel 17 is so placed as that, when the slide is fully open, the aperture 12 will be completely uncovered and a full draft of air to be preheated will pass through the intake to the preheating chamber, presently to be described. and I preferably provide the slide 14 with an arrowror other indicator, 20, which, when it registers with the channel 17 and the legend on the top of the lid adjacent such channel, will give the full volume of air. The channel 18, which is slightly in advance of the c channel 17.'v and opposite which is another legend, will indicate the point to which the slide 14 is to be adiusted to cut down the volume of air flowing through the aperture 12, and a pointer or other indicating mark 21 will preferably be provided soas to show when the slide has been brought into proper position to limit the flow of air.` The channel 19 marks the limit of closing movement of the slide 14 so that. Awhen the arrow 2O points to this channel, -the flow of air through theaperture 12 will be entirely cut off, and this furnishes a convenient and direct means of indicating the proper position of the plate.

Secured to the lid 10 is a depending cham,- ber 22 preferably fastened bv screws 23 so that it may be readily detached for cleaning or repairs, the said depending chamber 22 ingll, as shown in Figs. 2 and 3, so that the air delivered to the heating chamber 22 must pass through the intake aperture 12 and its flow can, therefore, be controlled by the slide 14. Beneaththe intake aperture 12 'and preferably formed integrally with the chamber 22, we provide an intake chamber 27 shown in the present illustration as rectangular in form, this centrally disposed intake chamber 27 having distributing outlets 28, four being shown in vthe. present instance, which outlets 2S are j n'eferablyarranged symmetrically, so that the air delivered to this intake chamber through the intake aperture l2 will be distributed regular symmetrically disposed streams to the interior ofthe casing 22, and a regular anduniform heating of these several streams of air will takeplace, for by this construction they are distributed from the intake chamber 27 evenly throughout the interior of the depending chamber 22.

.As shown in Figs. 2 and 3, the chamber has its bottom crowned so as to give a heating chamber the under surface of which is of increased area, and the vertical dimension of which enlarges outwardly from the center, so that the air coming through the intake aperture 12 in relatively cool conditi'on will, as it expands under the heat of the chamber, flow outwardly toward the periphery thereof into the increased or` enlarged area, and its point of entrance being at the apex of this crownedbottom its initial heating will be comparatively rapid.

At one side of the chamber 22, and pref-` erably in theside wall thereof, we provide a series of delivery apertures 29 through which the heated air will be ejected by .reason of its expansion to the fuel-box, the lid .10 being so placed that ythese apertures 29 will be directed toward the fuel box, and in order that the proper position of the lid and delivery apertures 29 may be' always determined, we provide the lid 10 with an .indicating mark, as the arrow 30, which,

when it points in 'the direction of the fuell`box, will insure the proper position of the apertures 29 and the delivery therethrough of the heated air to the fuel-box.

The device may, of course, be used in subthe stove top where it is found advantageous, but preferably this preheating lid will be Alocated to one side of the fire-box. It is found 'advantageous to place it adjacent the stove pi-pe or lflue, although vnaturally its sti'tution of an ordinary lid at any point on position on the stove top is a matter which can bc varied as the needs of the user may require. v

lNe have found that this construction comprising the main heating chamber with the crowned or upwardly bulgingbottom and the centrally-disposed intake chamber which receivesthe outside air from the intake aperture 12, enables us to do away with any complicated or extended channels or passages to secure the heating of the air, this breaking up and distributing in symmetrically-disposed streams of the air to be heated insuring its quick and complete heating and expansion and its delivery in proper con- 'dition to the outlets 29.; the crowning of the bottom of the heating chamber insuring a relatively quick initial heating and rapid eX- pansion into the open chamber. Furthermore, the system of regulation and control of the air by means of the slide for the intake aperture 12 and its directing indicia insures an easy and intelligent regulation of the device to meet the several conditions under which it is used.

The construction is simple and comprises but the two main castings and the regulating slide, all of which may be inexpensively produced and assembled, and the construction of which is such that impairment or destruction from overheating is practically eliminated.

1. An air heating lid for stoves comprising a top having a centrally-disposed air intake aperture, a slide controlling said aperture, a heating chamber having an open interior depending from said top and provided with delivery apertures, and a centrally-disposed air-receiving and distributing chamber within said heating chamber to which said intake aperture delivers, said distributing chamber being closed at its top and bottom i and having apertures in its side walls.

2. An air heating lid for stoves comprising a top having an air intake aperture, a wall surrounding said aperture and .having a series of intake channels therein, a slide within and Vguided by said wall to control said aperture, said slide lving in a plane below the top of the wall and the intake channels therein and adapted to register with each of said channels, and a heating chamber having an open interior depending from said top and provided with delivery apertures.

3. An air heating lid for stoves comprising a top having an air vintake aperture, a wall surrounding said aperture and provided with intake channels, a slide within and guided bv said wall to control said aperture, said slide lying :in a plane below the top of the-wall vand the intake channels therein and adapted to .register 'with .-said.

loo

channels, indicia adjacent each channel indicative of various positions of said slide, and a heating chamber having an open interior depending from said top and provided with delivery apertures.

at. An air heating lid for stoves comprising a. top having an air intake aperture, a rectangular Wall surrounding said aperture and having air intake channels adjacent said aperture, a slide disposed Within and guided by said rectangular Wall and provided with positioning indicia, indicia on said top ad-V jacent the intake channels and said Wall to indicate the several positions of said slide, and a heating chamber having an open interior depending from said top and provided with delivery apertures.

5. Any air heating lid for stoves comprising a top having a centrally-disposed air intake aperture, means for controlling said aperture, a heating chamber depending from said top and having a centrally crowned or upwardly bulging bottom, and an integrally-formed receiving and distributing chamber rising from the apex of said crowned bottom, said distributingchamber being closed at its top and bottom and provided with apertures in its side Walls through which the air from the'intake aperture is distributed. Y

6. An air heating lid for stoves comprising a top having an air intake aperture, a

Witnesses. Y

HARRY F. MYERS. EDGAR E. SNYDER. Titnessesz HARRY S. RUBY, F. P. D.- MILLER. A

Copies of this patent may he obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

